EFFECTS OF PION AND DELTA-SELF-ENERGIES IN NUCLEUS-NUCLEUS REACTIONS

被引：53

作者：

EHEHALT, W

CASSING, W

ENGEL, A

MOSEL, U

WOLF, G

机构：

[1] Institut für Theoretische Physik, Universität Giessen

来源：

PHYSICS LETTERS B | 1993年 / 298卷 / 1-2期

关键词：

D O I：

10.1016/0370-2693(93)91701-N

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The dynamical evolution of nucleus-nucleus collisions is described by an extended Boltzmann-Uehling-Uhlenbeck transport equation including nucleons, deltas and pions. Whereas nucleons are propagated in the conventional selfconsistent mean field, pions and deltas are treated as quasiparticles which propagate with their own selfenergies. The latter are extracted from an effective pion-dispersion relation adopted from the DELTA-hole model. Though quite substantial medium modifications are incorporated, the pion spectra and yields show only weak sensitivity to the in-medium effects. Also the dilepton signal from pi+pi- annihilation in the rho-mass region is found to be only moderately affected.

引用

页码：31 / 35

页数：5

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